According to our source within one of the three Singapore telcos, employees have been informed to avoid taking days off and be on standby from 18th to 22nd September.

The reason behind this blackout period is not mentioned, but our source indicates a high possibility of the iPhone 5S launch in Singapore on 21st September, a day later than the US launch due to the time difference.

Considering how the Samsung Galaxy S4 was launched in Singapore within a month after its unveiling in New York, and Samsung's bitter rivalry to up the ante against Apple, we do not rule out the possibility.